Document Type : Research Paper
Authors
1 phd student, assessment and measurement, psychology, allameh tabatab'i unviersity
2 professor, measurement and assessment Dep, Allameh Tabataba'i University, Tehran, Iran.
3 allameh university
4 AllamehTabatabai universiity
Abstract
This study was conducted with the aim of examining the gender differential item functioning of the English language items of the master psychology series exam using the methods available in the context of cognitive diagnostic models. The research sample included 2,455 female applicants and 919 male applicants who attended the Master of Psychology series exam in 1396. The G-DINA cognitive diagnostic model was fitted with data. DIF of the questions were examined with three methods: the Wald test, the likelihood ratio test and the revised likelihood ratio test. The results of these three methods had a moderate agreement on DIF detection. Based on the results 16 questions had DIF. Most of the questions had uniform DIF in favor of men. Questions that had non-uniform DIF, for the dominant applicants were in favor of men and for non-dominated applicants were in favor of women. It is recommended that additional studies be conducted to investigate the existence of the bias and the cause of the DIF.
Keywords
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